SWEVY ATC Refractometer User Manual

Introduction

This manual provides detailed instructions for the proper use and maintenance of your SWEVY ATC Refractometer, Model SW-LB32T. This precision instrument is designed for accurate measurement of sugar content (Brix) in various solutions, including juices, beverages, syrups, and for assessing cutting fluid concentration. It features automatic temperature compensation (ATC) for reliable readings across a range of temperatures.

SWEVY Sugar Refractometer, main product image showing the device and its key features: 0-32% Brix range, 0.2% minimum scale, and automatic temperature compensation. — SWEVY ATC Refractometer (Model SW-LB32T)

Parts Diagram

Familiarize yourself with the components of your refractometer:

Diagram showing the parts of the refractometer: Eyepiece, Diopter adjustment knob, Tube, Cover plate, Adjusting screw, Prism, and Main Prism Assembly. — Refractometer Structure and Optical Principles

**Prism:** The main optical component where the sample is placed.
**Daylight Plate (Cover Plate):** Protects the prism and spreads the sample evenly.
**Adjusting Screw (Calibration Screw):** Used for calibration to ensure accuracy.
**Tube:** The main body of the refractometer.
**Diopter Adjustment Knob (Eyepiece):** Used to focus the scale for clear viewing.
**Rubber Grip:** Provides a secure and comfortable hold.

Setup and Calibration

Before first use and periodically thereafter, calibrate the refractometer to ensure accurate readings.

**Preparation:** Open the daylight plate. Carefully clean the detection prism and the underside of the daylight plate with a soft, damp cloth.
**Apply Distilled Water:** Place 2-3 drops of distilled water onto the main prism. Close the daylight plate gently so the water spreads across the entire surface of the prism without air bubbles or dry spots.
**Temperature Adjustment:** Allow the distilled water sample to temperature adjust on the prism for approximately 30 seconds. This ensures the sample reaches the ambient temperature of the refractometer.
**View and Adjust:** Hold the refractometer with the daylight plate pointed towards a light source. Look into the eyepiece. You will see a circular field with a graduated scale. If the scale is unclear, rotate the diopter adjustment knob (eyepiece) to focus until the graduations are sharp.
**Calibrate to Zero:** The field of view should show an upper blue portion and a lower white portion. Turn the calibration screw until the boundary line between the blue and white fields meets exactly on the "0" mark of the scale. This completes the calibration process.

Note on Temperature Compensation (ATC): If your instrument is equipped with Automatic Temperature Compensation (ATC), ensure the ambient room temperature is approximately 20°C (68°F) when calibrating. When working temperature of the room or environment (not the sample) changes by more than 5°F, we recommend recalibrating to maintain accuracy. Once calibrated, shifts in ambient temperature within the acceptable range (10°C-30°C) should not affect accuracy.

Close-up of the refractometer showing the metal calibration screw for precise adjustment. — Metal Calibration Screws for Adjustment

Video: Demonstration of refractometer features and clean water correction (calibration).

Operating Instructions

Follow these steps for accurate measurement of your sample:

**Clean Prism:** Open the cover plate and carefully wipe the detection prism with a soft cloth.
**Apply Sample:** Take several drops of the solution to be tested. Place them on the detection prism. Gently close the cover plate to avoid air bubbles and ensure the solution spreads evenly over the prism surface.
**Observe Reading:** Align the instrument's light entrance panel with a light source or bright area. Look through the eyepiece to observe the field of view. If the scale is unclear, rotate the eyepiece adjustment knob to focus.
**Read Concentration:** Ensure the blue-white boundary in the field of view is clear. The scale value where this boundary line crosses the graduated scale indicates the concentration of the solution.

Four-step diagram illustrating refractometer measurement: 1. Clean prism, 2. Apply sample, 3. Observe through eyepiece, 4. Read the blue-white boundary on the scale. — Refractometer Measurement Steps

Close-up of the eyepiece showing the handwheel for diopter adjustment to ensure a clear scale. — Handwheel for Eyepiece Adjustment

The SWEVY ATC Refractometer is suitable for a wide range of applications, including:

Measuring sugar content in fruit sales.
Monitoring sugar levels in fruit planting.
Assessing sugar concentration in milk tea preparation.
Evaluating Brix in various juices and beverages.

Collage of images showing various applications of the refractometer: fruit sales, fruit planting, milk tea preparation, and juice & beverage analysis. — Widely Used Applications

Maintenance

Proper care and maintenance will ensure the longevity and accuracy of your refractometer:

**Cleaning:** Clean the instrument between each measurement using a soft, damp cloth. Failure to clean the prism regularly can lead to inaccurate results and damage to the prism's coating.
**Handling:** This is an optical instrument. Handle it with care and store it properly to prevent damage to optical components and its basic structure.
**Chemical Exposure:** Do not measure abrasive or corrosive chemicals with this instrument, as they can damage the prism's coating.
**Moisture:** Do not expose the instrument to damp working conditions, and never immerse it in water. If the instrument becomes foggy, water has entered the body.

Close-up of the refractometer's anti-slip rubber grip, highlighting its textured surface for a steady hold. — Eco-friendly Silicone Anti-slip Sleeve

Troubleshooting

Problem	Possible Cause	Solution
Inaccurate Readings	Improper calibration. Prism or cover plate is dirty. Sample and refractometer are at different temperatures.	Recalibrate the instrument using distilled water. Clean the prism and cover plate thoroughly. Allow the sample to temperature adjust on the prism for 30 seconds before reading.
Foggy View / Water Inside	Water has entered the instrument body.	Do not attempt to disassemble. Contact a qualified service technician or your dealer for assistance.
Unclear Scale in Eyepiece	Eyepiece is out of focus.	Rotate the diopter adjustment knob (eyepiece) until the scale is clear and sharp.

Specifications

Feature	Detail
Brand Name	SWEVY
Model Number	SW-LB32T
Measurement Range	0-32% Brix
Brix Minimum Division	0.2%
Measurement Accuracy	0.2%
Weight	Approximately 339g - 340g
Size	2057555mm
Use	Sugar content (juices, beverages, syrups), Cutting Fluid
Origin	Mainland China
High-concerned chemical	None
Temperature Compensation	Automatic Temperature Compensation (ATC)
Mechanism	Chrome-plated Copper Movement
Prism	High-definition light-transmitting prism
Grip	Eco-friendly silicone anti-slip sleeve

User Tips

For the most accurate results, always ensure the refractometer and your sample are at a similar temperature before taking a reading. Allow about 30 seconds for temperature equalization after applying the sample.
If the scale appears blurry, simply rotate the eyepiece to bring it into sharp focus. This is a common adjustment and does not indicate a fault with the device.
Regular cleaning of the prism and cover plate is crucial. Even small residues can lead to incorrect measurements.
Store your refractometer in its protective case when not in use to prevent damage to its delicate optical components.

Warranty and Support

For any service, repair, or warranty inquiries, please contact the manufacturer or your authorized dealer. Do not attempt to repair the instrument yourself, as this may void the warranty and cause further damage.

A detailed user manual in PDF format is available for download: SWEVY ATC Refractometer User Manual (PDF).

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SWEVY SW-LB32T